Abstract
The study of determination of bedrock depth has been done at Faculty of Medicine Sebelas Maret University Surakarta using seismic refraction method. The study was conducted on 3 lines using seismograph PASI type 16S24-P with spread length of 46 meters, interval between geophone 2 meters, 5 shots in each spread. Data processing is done using WinSism11.6 software and intercept time calculation method. Results of seismic data processing obtained 2 dimensions interpretation of 3 layers structure. In the first line, the P wave velocity (600-2000) m/s with the depth of 11 meters, the second line (400-2000) m/s with the depth of 11 meters and the third line (600-2000) m/s with the depth of 7 meters. Based on the P wave velocity that have been correlated with the drill data, the rock lithology of the 3 lines are consist of top soil, sand with silt and clay (massif). It was concluded that bedrock lies at depth 11 meters.
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